Shoe bottom unit and method of making the same



,July .6, 1937;, l G. A. MINE- 'I 2,085,989l

SHOE BOTTOM UNIT AND METHOD OE MAKING THE SAME Fled March 20, 1956 56 www f 4 52 gw? O Mh Patented July 6, 1937 UNITED S Para orties SHOE BOTTOM UNIT AND METHOD F MAK- ING THE SAIVIE 8 Claims.

This invention relates to improvements in shoe bottom unitsand to improved methods of making the same and is herein illustrated with ref erence to the manufacture of reinforced insole units of the. type comprising an insole and a heeland-shank reinforcing piece which is secured to the lower side of the insole, i. e., the side Which is to face the outsole.

One object of the present invention is to pr vide a reinforced shoe bottom or insole unit of the type referred to which is adapted for use in the manufacture of cement-lasted shoes in accordance with methods such, for example, as that disclosed and claimed in United States Letters Patent No. 1,932,545, granted October 31, 1933, upon application of George Goddu.

With this object in View, the invention, in one aspect, provides an improved method of making reinforced insole units which, as illustrated, in volves forming a marginal lasting lip on the forepart of an insole, securing strip material to a shank reinforcing piece in position to provide thereon a marginal lasting lip adapted to be disposed in adjoining end-to-end relation to the lip on the insole, and thereafter securing the reinforcing piece to the insole with the lip on the reinforcing piece constituting a continuation of the lip on the insole. As herein exemplied, an integral lasting lip is formed around the forepart only of the insole, a reinforcing piece which is adapted to reinforce the heel as well as the shank portion of the insole has a strip of fabric attached to eachlateral margin by a line of fastenings, such as stitches or staples, in such a manner as to form lasting lip members, the reinforcing piece and the insole are assembled with a longitudinally arched shank stiffener interposed between them (the reinforcing piece and the insole having been previouslyV coated with adhesive), and the insole and the reinforcing piece are molded to a shape corresponding to that of the bottom of a last, the molding pressure being utilized to secure the parts together by means of theadhesive.

The invention further consists in a reinforced insole or shoe bottom unit of improved construction resulting from the practice of my improved method.

The invention will be explained with reference to the accompanying drawing, in which Fig. 1 is a bottom plan View of an insole having an integral lasting lip formed in its forepart only;

Fig. 2 is a cross-sectional View on the line n n of Fig. 1;

Fig. 3 is abottom plan View of a heel-and-shankv Application March 20,

193s, serial No. 69,872 (o1. sc zm reinforcing piece adapted for-assembly with the insole shown in Fig. l, the reinforcing piece having lasting lips secured thereto which are formed of a different material from that of the reinforcing piece itself;

Fig. 4. is a sectional view on an enlarged scale taken along the line IV-IV' of Fig. 3; Fig. 5 is a bottom View of a reinforced insole unit made by assembling the heel-and-shank reinforcing piece shown in Fig. 3 with the insole shown in Fig. 1;

Fig. 6 isa sectional View Von an enlarged scale. taken along the line VI-VI of Fig. 5; and

Fig. 7 is a, sectional view taken along the line VII-VII of Fig. 5. i

In practicing my improved method, a full length insole 2li (Fig. 1) is formed of leather or other' relatively flexible material, as by a soleyrounding or die-cutting operation, and a heeland-shank reinforcing'piece 22 (Fig. 3) of ber, leatherboard, or other relatively stiff material is rounded or died out to the same contour as that of the heel and shank portion of the insole. Before the insole and the reinforcing piece are assembled, an edge slit is formed around the forepart only of the insole by means of a machine such, for example, as that disclosed in United States Letters Patent No. 1,668,081, granted May l, 1928, upon application of YW. C. Meyer, so as to form a marginal feather 28 and a marginal channel lip or fiap 39 and thereafter the flap 3B is raised and turned backwardly substantially into the position indicated at 32 (by full lines in Fig. 1 and by dotted lines in Fig. 2), the flap being inclined inwardly and upwardly from its base and forming `the forepart section of the lasting lip of the insole unit. This raising and turning of the channel flap may be performed by means of a machine such, for example, as that disclosed in United States Letters `Patent No. 1,712,929, granted May 14, 1929, cn application of W, C. Meyer. l

Asherein illustrated, the portions of the lasting lip which are provided upon the heel-and-shank reinforcing piece 22 consist of strips 3G of canvas or other suitable fabric, the inner edge portion of each strip being folded backwardly upon itself, as

best indicated in Fig. 4, and the folds preferably cemented together so as to provide lips 36 of double thickness. As indicated in Figs. 3 and 4, the unfolded portions of the strips 34 are cemented tothe heel-and-shank reinforcing piece 22 before the latter is applied to the insole and while it is in flat condition. In addition, the strips 34 are secured to the reinforcing piece by means of fastenings, such as stitches or staples 38, the fastenings being inserted along lines spaced from the lateral edges of the reinforcing piece a distance substantially equal to that between the edge of the insole and the root of the channel flap 30 so that when the reinforcing piece is assembled with the insole the lips 36 will constitute continuations of the lip 32 in the forepart of the insole. As shown, each strip 3d extends outwardlybeyond the stitches or staples to the adjacent edge of the reinforcing piece thereby covering those portions of the latter which are to receive the overlasted margin of the shoe upper.

After the lasting lip members 32 and 36 have been formed upon the insole and the reinforcing piece, respectively, the surfaces of these parts which are to be in contact with each other when the parts have been assembled are coated with cement, a longitudinally arched shank stiener is properly positioned upon the lower side of the insole, and the reinforcing piece is laid upon the insole over the shank stiifener. The parts are then secured together and at the same time the shank portions of the insole and the reinforcing piece are molded both longitudinally and transversely to correspond to the curvatures of the bottom of a last, as indicated in Figs. 6 and "I. Advantageously, this operation may be performed in accordance with the method disclosed in a pending application for United States Letters Patent, Serial No. 669,842, filed May 8, 1933, in the name of John M. Whelton. It will be noted that the lasting lip members in both the forepart and shank portions of theinsole unit are so disposed relatively to the lasting surface of thevunit that they will lie fiat against that surface during the molding operation and thus they will not interfere with the latter nor will they be distorted by the molding pressure.

A reinforced insole unit is thus provided in which the reinforcing piece is located at the lower side of the unit and in which a lasting lip is provided which extends around the forepart and along both sides of the shank portion of the unit. Such a unit is adapted for use in the manufacture of cement-lasted shoes wherein the lasting allow. ance of the upper is to be temporarily held in overlasted position upon the margin of the insole by stapling its edge to a lasting lip on the insole as disclosed in the Goddu Patent No. 1,932,545 hereinbefore referred to. In making a shoe having such an insole, after the insole has been assembled with an upper on the last and the margins of the insole and the upper have been coated with cement, the upper is worked over the last and its margin is laid in overlasted position upon the insole feather 28 in the forepart of the unit and upon the fabric covered lateral margins of the fiber reinforcing piece in the shank portion of the unit and the edges of the upper are secured by means of staples to the lasting lip. After the lasting cement has become set, the lasting lip, together with the attached edge portion rof the upper, is trimmed off beneath the line of the staples. v

The herein-described method of making insole units affords a practical solution of the problem of providing a suitable lasting lip on an insole unit the shank portion of which is reinforced at its lower or lasting side by means of fiber or other material which is of such a character that it is not Y practicable to form a lip integral therewith as by means of -channeling and lip turning operations. Moreover, the presence of the lip forming strips ofl'fabricupon the lateral vmarginsof the reinforcing piece provide a lasting surface that is pard ticularly well adapted to receive the cement which is to secure the upper in overlasted position to the shank portion of the insole unit.

Having described my invention, what l. claim as new and desire to secure by Letters Patent of the United States is: Y

l. That improvement in methods of making reinforced insole units which consists in slitting the edge of the forepart of an insole to form a marginal nap and raising and turning said flap backwardly to form on the forepart of the insole a lasting lip which is inclined inwardly and upwardly from the body of the insole, securing a strip of fabric to a vshank reinforcing piece in position to provide a marginal lasting lip inclined inwardly and upwardly from its base and adapted to be disposed in adjoining end-to-end relation to the lip on the insole, and thereafter securing said reinforcing piece to said insole with the lip on the reinforcing piece constituting a continuation of the lip on the insole.

2. That improvement in methods of making reinforced insole units which consists in forming a marginal lasting lip on the forepart of an insole in spaced relation to the edge of the insole, securing a strip of fabric to the marginal portion of a heel-and-shank reinforcing 'piece by means of a line of fastenings inserted between the opposite lateral edges of said strip in line with `the base of said forepart lip and by means of adhesive at the outer side of said line of fastenings, leav' ing the portion'of said strip at the inner side of said line of fastenings free to be raisedinto position to function as a lasting lip, and thereafter securing said reinforcing piece to said insole with the free portion of said strip in adjoining end-toend relation to the lip on the insole.

3. That improvement in methods of making re'- inforced insole units which consists in forming a marginal lasting lip on the forepart of an insole in spaced relation to Vthe edge of the insole, stitching a strip of fabric to a heel-and-shank reinforcing piece along a line spaced from the edge of said piece and from the edge of said strip lip and the adjacent `edge ofthe insole thereby Y providing a lasting lip on said reinforcing piece,

and thereafter securing the reinforcing piece to the insole with the lip on the reinforcing piece constituting an extension of the lip on the insole.

4. That improvement in methods of making reinforced insole units which consists in forming a marginal lasting lip on the forepart of an insole in spaced relation to the edge of the insole, folding one edge portion of a strip of fabric Abackwardly upon the adjacent portion of the strip to form a fabric lip, cementing the opposite edge portion of said strip to the marginal portion of a heel and shank reinforcing piece, securing said strip -to the marginal portion of said reinforcing piece by means of a line of fastenings inserted alo-ng the base of said lip, and thereafter securing said reinforcing piece to said insole with the lip on the reinforcing piece constituting a continuation of the lip on the insole.

5. That improvement in methods of making reinforced insole units which consists in forming a marginal channel and a channel flap on the forepart of an insole and turning said flap into position to constitute a forepart lasting lip, folding o-ne edge vportion of a strip of fabric backwardly .upon the adjacent portion of the strip and cernenting said folded portions together -to form -a fabric lip, lcementing .the opposite .edge

portion of said strip to the marginal portion of a heel-and-shank reinforcing piece with said fabric lip disposed in adjoining end-to-end relation to the lip on the insole, stitching said strip to said reinforcing piece along the inner boundary of the cemented area to reinforce the attachment of said strip along the base of said fabric lip, and thereafter securing said reinforcing piece to said insole with the lip on the reinforcing piece `l0 constituting a continuation of the lip on the insole.

6. A reinforced insole unit comprising an insole, a heel-and-shank reinforcing piece secured to said insole, a marginal lasting lip on the 15 forepart of the insole, and strips of fabric secured to the opposite marginal portions of said reinforcing piece by means of a-dhesive and by fastenings extending through the reinforcing 9 piece but not through the insole, said strips eX- tending inwardly beyond said adhesive and fastenings to constitute lasting lips the forward ends of which adjoin the rear extremities of the lasting lip on the insole.

7 A reinforced insole unit comprising an insole, a heel-and-shank reinforcing piece secured to the heel and shank portions of the insole, a lasting lip extending along the margin of the forepart of said unit, and a lasting lip formed of strip material secured to said reinforcing piece by means of fastenings inserted at the base of said lip and arranged so that the lip on the reinforcing piece constitutes a continuation of the lip on the insole, each of said lips being inclined upwardly and inwardly from its base.

8. A reinforced insole unit comprising an insole, a heel-and-shank reinforcing piece secured to the heel and shank portions of the insole, a shank stiifener interposed between the reinforcing piece and the insole, lasting lips formed of strip material secured to the reinforcing piece at opposite sides of said shank stiffener by stitches extending through said strip material and said reinforcing piece only, and a lasting lip extending along the margin of the forepart of said insole with its ends alined with the forward ends of the lips secured to the reinforcing piece.

GEORGE A. MINER.

CERTIFICATE OF CORRECTION.

Patent No. 2,085,989. Julyr 6, 1957.

GEORGE A MINER It is hereby certifiedithat error appears in the printed specification of the above numbered patentrequiring correction as follows: Page 2, second l column, line 14.6, claim 5, strike out the words`1ip and the radjacent;v edge of the insole"; and that the said Letters Patent should be read with this correction therein that the seme may conform to the record of the case in the Patent Office.

eiigd and sealed this 19th day of october, A. D. 1957.

-Henry Van Arsdale (Seal) Acting Commissioner of Patents. 

